For a first-order reaction, the ratio of time for 99.9% of the reaction to complete and half of the — Chemical Kinetics Chemistry Question

💡 Solution & Explanation

For a first-order reaction, the time for 99.9% completion is t_99.9% = 2.303/K * log(100/0.1) = 2.303/K * log(1000) = 6.909/K. The half-life is t_1/2 = 0.693/K. Taking the ratio: t_99.9% / t_1/2 = 6.909/0.693 ≈ 10.